[gcc r10-6033] vect: Fix ICE in vectorizable_comparison PR93292

[Jakub Jelinek]

https://gcc.gnu.org/g:dc9ba9d045d0cfc06207806fd64b06ab3304b196

commit r10-6033-gdc9ba9d045d0cfc06207806fd64b06ab3304b196
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jan 17 09:39:45 2020 +0100

    vect: Fix ICE in vectorizable_comparison PR93292
    
    The following testcase ICEs on powerpc64le-linux.  The problem is that
    get_vectype_for_scalar_type returns NULL, and while most places in
    tree-vect-stmts.c handle that case, this spot doesn't and punts only
    if it is non-NULL, but with different number of elts than expected.
    
    2020-01-17  Jakub Jelinek  <jakub@redhat.com>
    
    	PR tree-optimization/93292
    	* tree-vect-stmts.c (vectorizable_comparison): Punt also if
    	get_vectype_for_scalar_type returns NULL.
    
    	* g++.dg/opt/pr93292.C: New test.

Diff:
---
 gcc/ChangeLog                      |  6 ++++++
 gcc/testsuite/ChangeLog            |  3 +++
 gcc/testsuite/g++.dg/opt/pr93292.C | 18 ++++++++++++++++++
 gcc/tree-vect-stmts.c              |  2 +-
 4 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e364f61..d8c34b2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2020-01-17  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/93292
+	* tree-vect-stmts.c (vectorizable_comparison): Punt also if
+	get_vectype_for_scalar_type returns NULL.
+
 2020-01-16  Jan Hubicka  <hubicka@ucw.cz>
 
 	* params.opt (-param=max-predicted-iterations): Increase range from 0.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index eea3bd2..5bd1ab2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2020-01-17  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/93292
+	* g++.dg/opt/pr93292.C: New test.
+
 	PR testsuite/93294
 	* lib/c-compat.exp (compat-use-alt-compiler): Handle
 	-fdiagnostics-urls=never similarly to -fdiagnostics-color=never.
diff --git a/gcc/testsuite/g++.dg/opt/pr93292.C b/gcc/testsuite/g++.dg/opt/pr93292.C
new file mode 100644
index 0000000..a368319
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/pr93292.C
@@ -0,0 +1,18 @@
+// PR tree-optimization/93292
+// { dg-do compile }
+// { dg-options "-O3 -w" }
+
+struct A {
+  static int foo (float x) { static int b; b = x ? x + 0.5 : 0; return b; }
+};
+
+void
+bar (int *d, float e)
+{
+  float g;
+  for (int h = 0; h < 64; h++)
+    {
+      d[h] += A::foo (g < 0 ? : g > 5 ? : g);
+      A::foo (e);
+    }
+}
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index df2899b..2ca8e49 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -10492,7 +10492,7 @@ vectorizable_comparison (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
     {
       vectype = get_vectype_for_scalar_type (vinfo, TREE_TYPE (rhs1),
 					     slp_node);
-      if (maybe_ne (TYPE_VECTOR_SUBPARTS (vectype), nunits))
+      if (!vectype || maybe_ne (TYPE_VECTOR_SUBPARTS (vectype), nunits))
 	return false;
     }
   else if (maybe_ne (nunits, TYPE_VECTOR_SUBPARTS (vectype)))